{"product_id":"aerostar-merv-11-filter-superior-air-quality-pack-of-12","title":"21 1\/2 x 23 5\/16 x 1 Carrier Replacement Filter - MERV 11","description":"\u003cp\u003eIn this review of the 21 1\/2 x 23 5\/16 x 1 Carrier Replacement Filter by Aerostar, the bottom line is simple: this boxed set of 12 pleated filters is aimed at homeowners and HVAC techs who need a long-lasting, allergen-targeting replacement for specific Carrier\/Bryant units. The reviewer found the MERV 11 media effective at removing particles in the 1 to 10 micron range and appreciated the boxed quantity and clear fitment notes. If you want a practical, mid-high efficiency filter that balances filtration and airflow, this product is worth considering.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExact fitment:\u003c\/strong\u003e Sized to replace Carrier\/Bryant part numbers and fit FV4, FK4, FC4 and related series for straightforward installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMERV 11 pleated media:\u003c\/strong\u003e Captures microscopic particles such as pollen, pet dander, dust mites, spores and smoke without overly restricting airflow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrostatically charged synthetic material:\u003c\/strong\u003e Uses charged fibers to draw and hold allergens between 1 - 10 microns for improved indoor air quality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBox of 12:\u003c\/strong\u003e Provides a year or more of supply for many households when changed every 60-90 days, reducing reorder frequency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComparable ratings:\u003c\/strong\u003e Performance aligns with MPR 1000-1200 and FPR 7, giving a familiar benchmark for shoppers comparing brands.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in the USA:\u003c\/strong\u003e Domestic manufacturing for buyers who prefer US-made HVAC consumables.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis filter set is best for homeowners with Carrier or Bryant furnaces and air handlers listed in the fitment details who want a step up from basic fiberglass filters. The boxed 12-count and 60-90 day change recommendation suit families, allergy sufferers and anyone who prefers fewer shopping trips and predictable maintenance intervals.\u003c\/p\u003e\u003cp\u003eThose with higher-efficiency needs - for example, HEPA-level removal or sub-micron smoke filtration - should look elsewhere, and buyers who need nonstandard thicknesses should confirm the actual size of 21-1\/2 in x 23-5\/16 in x 3\/4 in before ordering.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGood balance of filtration and airflow thanks to pleated \u003cstrong\u003eMERV 11 media\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eBox of 12 reduces the hassle of frequent reordering and is cost effective for multi-filter households.\u003c\/li\u003e\n\u003cli\u003eElectrostatically charged synthetic fibers improve capture of common allergens and dust.\u003c\/li\u003e\n\u003cli\u003eClear compatibility list makes it easy to confirm fit for many Carrier\/Bryant models.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eNot designed to match HEPA or true sub-micron smoke capture, so those needing maximum filtration may require different solutions.\u003c\/li\u003e\n\u003cli\u003eActual thickness is 3\/4 in rather than a full 1 in, so double-check your slot clearance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal size\u003c\/td\u003e\n\u003ctd\u003e21-1\/2 x 23-5\/16 x 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual size\u003c\/td\u003e\n\u003ctd\u003e21-1\/2 in x 23-5\/16 in x 3\/4 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEfficiency rating\u003c\/td\u003e\n\u003ctd\u003eMERV 11 (comparable to MPR 1000-1200, FPR 7)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMedia type\u003c\/td\u003e\n\u003ctd\u003ePleated electrostatically charged synthetic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003eBox of 12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended change frequency\u003c\/td\u003e\n\u003ctd\u003e60-90 days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of origin\u003c\/td\u003e\n\u003ctd\u003eMade in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Aerostar 21 1\/2 x 23 5\/16 x 1 Carrier Replacement Filter is a practical choice for those replacing filters in compatible Carrier or Bryant systems who want improved allergen control without heavy airflow penalty. The MERV 11 pleated media, electrostatic charge and 12-pack value make it a sensible buy for households and small maintenance programs seeking consistent indoor air quality.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWill this filter fit my Carrier or Bryant unit?\u003c\/strong\u003e\u003cbr\u003eCheck your existing filter slot and the listed compatible models (FV4, FK4, FC4, FB4, FA4 and related codes); the actual size is 21-1\/2 in x 23-5\/16 in x 3\/4 in.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow often should these filters be changed?\u003c\/strong\u003e\u003cbr\u003eAerostar recommends changing every 60-90 days; households with pets or allergies may choose the shorter interval.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does MERV 11 compare to HEPA?\u003c\/strong\u003e\u003cbr\u003eMERV 11 captures many common allergens between 1-10 microns but is not equivalent to HEPA for sub-micron particle removal.\u003c\/p\u003e","brand":"Aerostar","offers":[{"title":"Default Title","offer_id":46696615608539,"sku":"B071CVCTTV","price":134.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81RuBCNIlvL._AC_SL1500.jpg?v=1745132770","url":"https:\/\/gearmusthave.com\/products\/aerostar-merv-11-filter-superior-air-quality-pack-of-12","provider":"GearMustHave","version":"1.0","type":"link"}